00342nam a2200109 a 450000500170000008200180001710000150003524500740005026000350012430000250015949000480018420251203091321.0  a330.0151bDEA  aDean,Edwin  aSupply responses of African farmersbtheory and measurement in Malawi  aAmsterdambNorth Hollandc1965  axiv, 174p.c24cm. PB  aContributions to economic analysis, Vol 4 I